PMID- 34202236 OWN - NLM STAT- MEDLINE DCOM- 20210803 LR - 20210803 IS - 1660-4601 (Electronic) IS - 1661-7827 (Print) IS - 1660-4601 (Linking) VI - 18 IP - 13 DP - 2021 Jun 25 TI - Commercial Gilthead Seabream (Sparus aurata L.) from the Mar Menor Coastal Lagoon as Hotspots of Microplastic Accumulation in the Digestive System. LID - 10.3390/ijerph18136844 [doi] LID - 6844 AB - This paper presents the results on the presence and characterization of microplastics (MP) in the gastrointestinal tract of gilthead seabream (Sparus aurata L.), a species of commercial interest from the Mar Menor coastal lagoon in Southeast Spain. This is the first time that microplastic ingestion is recorded in any species from this semi-enclosed bay. Stomach and intestine from a total of 17 specimens captured by local fishermen were processed, and microplastic particles and fibers found in all of them were displayed. Overall, 40.32% (279/692) of total isolated microparticles proved to be microplastics; i.e., <5 mm, as identified by FTIR spectroscopy. The average value by fish was 20.11 +/- 2.94 MP kg(-1), corresponding to average concentrations of 3912.06 +/- 791.24 and 1562.17 +/- 402.04 MP by kg stomach and intestine, respectively. Four MP forms were isolated: fiber (71.68%), fragment (21.15%), film (6.81%), and microbead (0.36%), with sizes ranging from 91 microm to 5 mm, an average of 0.83 +/- 0.04 mm, and no statistically significant differences between mean sizes in stomach and intestine samples (F-test = 0.004; p = 0.936). Nine polymer types were detected, although most of fibers remained unidentified because of their small size, the presence of polymer additives, or closely adhered pollutants despite the oxidizing digestion carried out to eliminate organic matter. No significant correlation was found between main biological parameters and ingested microplastics, and high-density polyethylene (HDPE), low-density polyethylene (LDPE), polyethylene polypropylene (PEP), and polyvinyl (PV) were identified as the most abundant polymers. The average microplastic ingestion in this study area was higher than those reported in most studies within the Mediterranean Sea, and closely related to microplastic pollution in the surrounding area, although with a predominance of fiber form mainly due to fishery activities. FAU - Bayo, Javier AU - Bayo J AUID- ORCID: 0000-0002-6975-4316 AD - Department of Chemical and Environmental Engineering, Technical University of Cartagena, Paseo Alfonso XIII 44, E-30203 Cartagena, Spain. FAU - Rojo, Dolores AU - Rojo D AUID- ORCID: 0000-0001-6543-131X AD - Department of Chemical and Environmental Engineering, Technical University of Cartagena, Paseo Alfonso XIII 44, E-30203 Cartagena, Spain. FAU - Martinez-Banos, Pedro AU - Martinez-Banos P AD - C&C MedioAmbiente, E-30204 Cartagena, Spain. FAU - Lopez-Castellanos, Joaquin AU - Lopez-Castellanos J AD - Department of Chemical and Environmental Engineering, Technical University of Cartagena, Paseo Alfonso XIII 44, E-30203 Cartagena, Spain. FAU - Olmos, Sonia AU - Olmos S AD - Department of Chemical and Environmental Engineering, Technical University of Cartagena, Paseo Alfonso XIII 44, E-30203 Cartagena, Spain. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20210625 PL - Switzerland TA - Int J Environ Res Public Health JT - International journal of environmental research and public health JID - 101238455 RN - 0 (Microplastics) RN - 0 (Plastics) RN - 0 (Water Pollutants, Chemical) SB - IM MH - Animals MH - Environmental Monitoring MH - Gastrointestinal Tract MH - Mediterranean Sea MH - Microplastics MH - Plastics MH - *Sea Bream MH - Spain MH - *Water Pollutants, Chemical/analysis PMC - PMC8297190 OTO - NOTNLM OT - Mar Menor OT - fish OT - gilthead seabream OT - ingestion OT - marine pollution OT - microplastic COIS- The authors declare no conflict of interest. EDAT- 2021/07/03 06:00 MHDA- 2021/08/04 06:00 PMCR- 2021/06/25 CRDT- 2021/07/02 01:13 PHST- 2021/05/29 00:00 [received] PHST- 2021/06/21 00:00 [revised] PHST- 2021/06/23 00:00 [accepted] PHST- 2021/07/02 01:13 [entrez] PHST- 2021/07/03 06:00 [pubmed] PHST- 2021/08/04 06:00 [medline] PHST- 2021/06/25 00:00 [pmc-release] AID - ijerph18136844 [pii] AID - ijerph-18-06844 [pii] AID - 10.3390/ijerph18136844 [doi] PST - epublish SO - Int J Environ Res Public Health. 2021 Jun 25;18(13):6844. doi: 10.3390/ijerph18136844.